| （単位：千ドル） | 有利子負債合計 | 前年比（％） |
|---|---|---|
| 1Q18 | 55,453 | -0.1% |
| 4Q17 | 55,630 | +1.1% |
| 3Q17 | 55,738 | +2.8% |
| 2Q17 | 55,498 | +2.4% |
| 1Q17 | 55,525 | +1.6% |
| 4Q16 | 55,040 | -0.3% |
| 3Q16 | 54,233 | -22.2% |
| 2Q16 | 54,206 | -20.6% |
| 1Q16 | 54,646 | -17.8% |
| 4Q15 | 55,194 | -13.5% |
| 3Q15 | 69,726 | +14.9% |
| 2Q15 | 68,277 | +25.8% |
| 1Q15 | 66,487 | +34.5% |
| 4Q14 | 63,804 | +44.3% |
| 3Q14 | 60,678 | +60.4% |
| 2Q14 | 54,253 | +42.0% |
| 1Q14 | 49,415 | +38.2% |
| 4Q13 | 44,217 | +22.6% |
| 3Q13 | 37,832 | +24.5% |
| 2Q13 | 38,206 | -26.1% |
| 1Q13 | 35,752 | -32.3% |
| 4Q12 | 36,062 | -32.5% |
| 3Q12 | 30,378 | -42.1% |
| 2Q12 | 51,703 | -2.7% |
| 1Q12 | 52,776 | -2.2% |
| 4Q11 | 53,458 | -2.2% |
| 3Q11 | 52,427 | +36.8% |
| 2Q11 | 53,146 | +36.6% |
| 1Q11 | 53,938 | - |
| 4Q10 | 54,651 | - |
| 3Q10 | 38,323 | - |
| 2Q10 | 38,898 | - |